Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor Sasha Alexander NCIS Special Agent Caitlin Todd Actor Michael Weatherly NCIS Special Agent Anthony "Tony" Dinozzo Actor Pauley Perrette Forensic Specialist Abby Sciuto Actor Sean Murray NCIS Special Agent Timothy McGee Actor David McCallum Dr. Donald "Ducky" Mallard Actor Brian Dietzen Jimmy Palmer Guest Star Mýa Samantha "Jade" King Guest Star Daya Vaidya Summer Diamond, Keisha Scott Guest Star Scott Alan Smith Det. Mark Mauceri Guest Star Kiko Ellsworth Willie Taylor Guest Star Conrad Roberts Benjamin King Guest Star Steven Brand Ian Alfred "Bulldog" Hitch Guest Star Shang Forbes D.J. Night Trap Guest Star Mark Griffin Blue McGinty Guest Star Donald P. Bellisario Executive Producer Thomas J. Wright Director Frank Military Writer